The Spatial Dimension of US House Price Developments

Spatial heterogeneity and spatial dependence are two well established aspects of house price developments. However, the analysis of differences in spatial dependence across time and space has not gained much attention yet. In this paper we jointly analyze these three aspects of spatial data. We apply a panel smooth transition regression model that allows for heterogeneity across time and space in spatial house price spillovers and for heterogeneity in the effect of the fundamentals on house price dynamics. We find evidence for heterogeneity in spatial spillovers of house price developments across space and time: house price developments in neighboring regions spill over stronger in times of increasing neighboring house prices compared to declining neighboring house prices. This is interpreted as evidence for the disposition effect. Moreover, heterogeneity in the effect of the fundamentals on house price dynamics could not be detected for all variables; real per capita disposable income and the unemployment rate have a homogeneous effect across time and space

Further evidence on the (in-) efficiency of the U.S. housing market

Extending the controversial findings from relevant literature on testing the efficient market hypothesis for the U.S. housing market, the results from the monthly and quarterly transaction-based Case-Shiller indices from 1987 to 2009 provide further empirical evidence on the rejection of the weak-form version of efficiency in the U.S. housing market. In addition to conducting parametric and non-parametric tests, we apply technical trading strategies to test whether or not the inefficiencies can be exploited by investors earning excess returns. The empirical findings suggest that investors might be able to obtain excess returns from both autocorrelation- and moving average-based trading strategies compared to a buy-and-hold strategy

An application of two non-parametric techniques to the prices of British dwellings: an examination of cyclicality

Using a Pesaran-Timmermann test of co-movement, Cook and Watson (2015) suggest they have highlighted the ‘ripple’ effect. Using reference series of the UK, London, Scotland, and three deterministic-periodic series, regional prices are shown to have similar cyclical characteristics, with delays based on distance from London. With periodicities consistent with those revealed by spectral analysis, the deterministic-periodic series reference provides a means of establishing cyclical characteristics whilst avoiding issues concerning variable amplitudes. Although a ripple is revealed, using London as a reference poses problems, empirically: its cycle is likely to be atypical as well as asynchronised

Global urban environmental change drives adaptation in white clover

Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban-rural gradients were associated with the evolution of clines in defense in 47% of cities throughout the world. Variation in the strength of clines was explained by environmental changes in drought stress and vegetation cover that varied among cities. Sequencing 2074 genomes from 26 cities revealed that the evolution of urban-rural clines was best explained by adaptive evolution, but the degree of parallel adaptation varied among cities. Our results demonstrate that urbanization leads to adaptation at a global scale

Economic linkages across space

A diagrammatic framework is developed to study the economic linkages between regions or cities. Hitherto, such linkages have not been a focus of the literature. The framework is used to analyse the impact of shocks that occur in one region (for example, productivity improvements or increases in housing supply) on other regions, highlighting the key adjustment mechanisms and their long-run implications for incomes, the cost of living, and the spatial distribution of population. The approach is linked to both the New Economic Geography and urban systems literatures and empirical studies are reviewed that quantify the key mechanisms that are identified

Spontaneous rupture of spleen in malaria: a case report

Malaria is one of the most prevalent infectious diseases in the world, especially in developing world like India. Wide spectrum of complications can happen in malaria. Spontaneous rupture of spleen is one such rare complication. Here we report a case of 17 year old girl with P.Vivax malaria causing spontaneous rupture of spleen which was managed conservatively and was discharged with no complications